Explanation

Iron is galvanized by coating it with zinc.

It prevents rusting and corrosion by acting as a protective barrier.

Explanation

Straw, camphor, alcohol, petrol, diesel etc. catch fire easily to release heat energy and light energy.

So, these are examples of combustible substances.

Explanation

An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space.

AGM 25-12-2022

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RY12-02-23

Explanation

The scientific study of different aspects of plants is called botany

plant biology or phytology, is the science of plant life and a branch of biology.

Additional information:

study of soil is called  pedology

study of grasses is called agrostology

study of food is called bromatology

study of cells is called cytology

study of animals is called zoology

study of skin is called dermatology

study of insects is called entomology

study of eggs is called oology

study of earthquakes is called seismology

study of viruses is called virology

study of bacteria is called bacteriology

study of the heart is called cardiology 

study of fermentation is called zymology

Explanation

Explanation

Blood cells are made in the bone marrow.

The bone marrow is the soft, spongy material in the center of the bones.

It produces about 95% of the body's blood cells.

Explanation

Algae, especially phytoplankton in oceans, are responsible for producing the largest amount of oxygen on Earth.

It contributing to over 50% of the planet's oxygen supply.

Explanation

Caffeine occurs naturally in the tea plant,

Camellia sinensis, so all brewed tea contains some caffeine. 

Tea leaves contain 3.5% caffeine,

while

Coffee beans have 1.1–2.2%.

Explanation

Weight of the adult men brain $=49$ ounces
So, $49$ ounces
$=\frac{49}{16}$  pounds
$=3.0625$ pounds
Therefore, the weight in pounds is $3.0625$.

Explanation

Metacarpal bones are the five long bones found in the hand, connecting the wrist (carpal bones) to the fingers (phalanges).

They form the structure of the palm and provide support for finger movements.